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P1AF7 Cadillac Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

Quick Answer

The drive motor generator Power Inverter Control Module (PIM) contains two Motor Control Modules (MCMs). Common causes include Reprogram Power Inverter Control Module (PIM), Faulty Power Inverter Control Module (PIM), Power Inverter Control Module (PIM) harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1AF7 Cadillac indicates Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage.
Common causes: Common causes include Reprogram Power Inverter Control Module (PIM), Faulty Power Inverter Control Module (PIM), Power Inverter Control Module (PIM) harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 891

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1AF7 Cadillac Description

The drive motor generator Power Inverter Control Module (PIM) contains two Motor Control Modules (MCMs). Each MCM measures hybrid battery High Voltage (HV) with several internal sensors. The MCMs test for Loss Ff Isolation (LOI) between either the HV positive circuit or HV negative circuit and vehicle chassis. The MCMs test for isolation when the HV contactor relays are closed. The battery energy control module (BECM) only tests the hybrid battery assembly for HV loss of isolation when the HV contactor relays are open.
MCM LOI is detected through the use of two high-impedance resistors and voltage measuring circuitry. The two resistors are connected in series between the HV positive and HV negative circuits. The center connection of the two resistors is also connected to vehicle chassis. The MCM then measures the voltage drop across one of the resistors. Without a loss of isolation, the MCM should measure about half of the high voltage potential. This is referred to as mid-pack voltage. The Mid-pack voltage value is then doubled by the software and displayed on a scan tool as Motor 1 Isolation Voltage or Motor 2 Isolation Voltage. When a loss of isolation is present, the motor isolation voltage display will indicate voltage that is more or less than actual hybrid battery high voltage. The MCM monitors the LOI voltage measuring circuitry for correct operation.

OBDII Code P1AF7 Cadillac - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage - AutoCodes.com — P1AF7 Cadillac Code - Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1AF7 Cadillac?

Reprogram Power Inverter Control Module (PIM)
Faulty Power Inverter Control Module (PIM)
Power Inverter Control Module (PIM) harness is open or shorted
Power Inverter Control Module (PIM) circuit poor electrical connection

How to Fix the DTC P1AF7 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1AF7 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1AF7 Cadillac Code

1. What are the common symptoms of OBDII code P1AF7 in a Cadillac related to the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage issue?

- Common symptoms may include reduced hybrid system performance, illuminated warning lights on the dashboard, and potential loss of power.

2. What are the possible causes of the OBDII code P1AF7 in a Cadillac indicating an issue with the Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- Possible causes may include a faulty drive motor control module, issues with the hybrid battery voltage isolation sensor circuit, or electrical issues within the hybrid system.

3. How can I diagnose the OBDII code P1AF7 in a Cadillac related to Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage problem?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, conducting a visual inspection of the hybrid system components, and testing the voltage isolation sensor circuit.

4. Can I continue driving my Cadillac if the OBDII code P1AF7 related to Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage is present?

- It is not recommended to continue driving the vehicle with this fault code present, as it can lead to further damage to the hybrid system components and potentially unsafe driving conditions.

5. How can I repair the OBDII code P1AF7 in a Cadillac indicating an issue with Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- Repair options may include replacing the drive motor control module, repairing or replacing the voltage isolation sensor circuit, and addressing any underlying electrical issues in the hybrid system.

6. Are there any DIY tips for resolving the OBDII code P1AF7 related to Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Cadillac?

- DIY tips may include checking and tightening electrical connections, inspecting for any visible damage to wiring, and ensuring proper insulation and grounding of hybrid system components.

7. How critical is it to address the OBDII code P1AF7 in a Cadillac indicating a problem with Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage?

- It is essential to address this code promptly to prevent further damage to the hybrid system components, ensure optimal performance, and maintain the safety of the vehicle.

8. Is it necessary to reset the OBDII code P1AF7 after repairing the issue with Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Cadillac?

- Yes, it is recommended to clear the fault codes using a diagnostic scanner after repairing the underlying issue to reset the system and ensure the code does not reappear.

9. What are the potential risks of ignoring the OBDII code P1AF7 related to Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Cadillac?

- Ignoring this fault code can lead to further damage to the hybrid system components, decreased fuel efficiency, and potential safety hazards while driving.

10. How can regular maintenance help prevent the occurrence of the OBDII code P1AF7 indicating an issue with Drive Motor 2 Control Module Hybrid Battery Voltage Isolation Sensor Circuit High Voltage in a Cadillac?

- Regular maintenance, including scheduled inspections of the hybrid system components, can help identify and address potential issues before they trigger fault codes like P1AF7, ensuring the system operates smoothly.